IBM 1130 User Manual page 82

Section 15: SOME PRELIMINARY QUESTIONS
AND ANSWERS REGARDING DATA
STORAGE
CONTENTS
Introduction ..................•........ 15.01.00
Data - on Disk or Cards? .............. 15.10.00
General Considerations ..•..........• 15.10.01
Flexibility in Order of Processing .... 15.10.10
Jobs Involving More Than One File ...• 15.10.20
Frequency of Changes to Your File .... 15.10.30
Need for Inquiry into Your File ...... 15.10.40
Size of Your Data File .•.•........... 15.10.50
Your Backup Requirements .......... 15.10.60
Record Size ........................ 15.10.70
other Considerations ............... 15.10.80
Summary ..............•..•........ 15.10.90
Section
Subsections
Page
15 00
I
00 01
How to Safeguard Your Disk Data Files .. 15.20.00
Introduction ..............•......... 15.20.01
Know Your Data .................... 15.20.10
Know What Can Happen to Your Data .. 15.20.20
Design an Accident-Insensitive System 15.20.30
Detect Errors Before They Do
Damage ............................ 15.20.40
Plan Modest-Size, Modular Programs 15.20.50
Always Back Up Your Disk Files with a
Duplicate Copy ..................... 15.20.60
Provide Tested and Documented
Recovery Procedures ................ 15.20.70